﻿// --------------------------------------------------------------------------------------------------------------------
// <copyright file="StronglyTypedCollectionConsumer.cs" company="DHGMS Solutions">
//   Copyright 2004-2014 DHGMS Solutions.
//      
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//      
//   http://www.apache.org/licenses/LICENSE-2.0
//      
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
// </copyright>
// <summary>
//   TODO: Update summary.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace Dhgms.TplHelper.Model.DataReaderConsumer
{
    using System.Threading.Tasks;
    using Dhgms.TplHelper.Model.Info;
    using System;
    using System.Collections.Generic;
    using System.Data;
    using System.Data.Common;

    using Dhgms.TplHelper.Model.Info.TaskResult;

    /// <summary>
    /// TODO: Update summary.
    /// </summary>
    public class StronglyTypedCollectionTarget<TInformationType, TAdoNetHelperClass> : IDataReaderConsumer<IList<TInformationType>>//, ITaskDataResult<IList<TInformationType>>
        where TInformationType : Dhgms.DataManager.Model.Info.InfoBase<TInformationType>
        where TAdoNetHelperClass : Dhgms.DataManager.Model.Helper.AdoNet.AdoNetBase<TInformationType>, new()
    {
        /// <summary>Processes data reader.</summary>
        /// <param name="dataReader">The data reader.</param>
        /// <returns>The number of records processed</returns>
        public Task<DataRetrievalProcessorResult<IList<TInformationType>>> DataReaderAction(IDataReader dataReader)
        {
            if (dataReader == null)
            {
                throw new ArgumentNullException("dataReader");
            }

            var dataCollection = new List<TInformationType>();

            long recordCount = 0;
            var helper = new TAdoNetHelperClass();
            while (dataReader.Read())
            {
                dataCollection.Add(helper.GetStronglyTypedObjectFromDataReaderRow(dataReader));
                recordCount++;
            }

            return
                Task.FromResult(
                    new DataRetrievalProcessorResult<IList<TInformationType>>(recordCount, dataCollection));
        }
    }
}
